Chapter 5

ATAPI Interface

Tape Capacity Page Code

The following table presents the Tape Capacity Page layout.

Byte

Description

Value

Meaning

 

 

 

 

0

Page Code

31h

Tape Capacity Page

 

 

 

 

1

Reserved

00h

-

 

 

 

 

2,3

Page Length

00,20h

32 Bytes Following

 

 

 

 

4,5

Parameter Code

0001h

Remaining Capacity, Part 0 Code

 

 

 

 

6

Parameter Bits

40h

Device Controlled Counter

 

 

 

 

7

Parameter Length

04h

4-byte Counter

 

 

 

 

8-11

Remaining Capacity, Partition 0 Value

N,N,N,N

 

 

 

 

 

12-15

Parameter: Code, Bits, Length

0002h,

Remaining Capacity, Part 1 Code

 

 

40h,04h

 

 

 

 

 

16-19

Remaining Capacity, Partition 1 Value

N,N,N,N

 

 

 

 

 

20-23

Parameter: Code, Bits, Length

0003h,

Maximum Capacity, Part 0 Code

 

 

40h,04h

 

 

 

 

 

24-27

Maximum Capacity, Partition 0 Value

N,N,N,N

 

 

 

 

 

28-31

Parameter: Code, Bits, Length

0004h,

Maximum Capacity, Part 1 Code

 

 

40h,04h

 

 

 

 

 

32-35

Maximum Capacity, Partition 1 Value

N,N,N,N

 

 

 

 

 

The Remaining Capacity for non-current partitions shall be the same as the Maximum Capacity for that partition. Capacities are multiplied by 1024 to determine the number of bytes. These values are conservative estimates.

The Parameter bit, TSD (not shown), is zero implying that the drive can save parameters across resets, etc. Parameters are not saved but are re-computed correctly from any logical position, regardless of the previous states of the tape drive.

Page 46

STT8000A Product Manual

Page 54
Image 54
Seagate STT8000A manual Tape Capacity Page Code, Following table presents the Tape Capacity Page layout